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https://issues.apache.org/jira/browse/SOLR-7191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14970253#comment-14970253
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Damien Kamerman commented on SOLR-7191:
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1. hmmm cancel that. Initially I noticed very slow (around 60min total)
shutdown in JmxMonitoredMap.clear(). I went back to test it and was unable to
reproduce!? I did update the trunk. A partial stack is all I've saved:
at org.apache.solr.core.JmxMonitoredMap.clear(JmxMonitoredMap.java:144)
at org.apache.solr.core.SolrCore.close(SolrCore.java:1263)
at org.apache.solr.core.SolrCores.close(SolrCores.java:124)
at org.apache.solr.core.CoreContainer.shutdown(CoreContainer.java:564)
at
org.apache.solr.servlet.SolrDispatchFilter.destroy(SolrDispatchFilter.java:172)
2. OK, will look into that.
> Improve stability and startup performance of SolrCloud with thousands of
> collections
> ------------------------------------------------------------------------------------
>
> Key: SOLR-7191
> URL: https://issues.apache.org/jira/browse/SOLR-7191
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 5.0
> Reporter: Shawn Heisey
> Assignee: Shalin Shekhar Mangar
> Labels: performance, scalability
> Attachments: SOLR-7191.patch, SOLR-7191.patch, SOLR-7191.patch,
> SOLR-7191.patch, lots-of-zkstatereader-updates-branch_5x.log
>
>
> A user on the mailing list with thousands of collections (5000 on 4.10.3,
> 4000 on 5.0) is having severe problems with getting Solr to restart.
> I tried as hard as I could to duplicate the user setup, but I ran into many
> problems myself even before I was able to get 4000 collections created on a
> 5.0 example cloud setup. Restarting Solr takes a very long time, and it is
> not very stable once it's up and running.
> This kind of setup is very much pushing the envelope on SolrCloud performance
> and scalability. It doesn't help that I'm running both Solr nodes on one
> machine (I started with 'bin/solr -e cloud') and that ZK is embedded.
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